EP2080391B1 - Methods and apparatuses for session control of ims services via a cs access by ussd messages - Google Patents

Methods and apparatuses for session control of ims services via a cs access by ussd messages Download PDF

Info

Publication number
EP2080391B1
EP2080391B1 EP07822267.6A EP07822267A EP2080391B1 EP 2080391 B1 EP2080391 B1 EP 2080391B1 EP 07822267 A EP07822267 A EP 07822267A EP 2080391 B1 EP2080391 B1 EP 2080391B1
Authority
EP
European Patent Office
Prior art keywords
ia
ussd
ims
ue
network
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP07822267.6A
Other languages
German (de)
French (fr)
Other versions
EP2080391A1 (en
Inventor
Andreas Witzel
Ralf Keller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US86449306P priority Critical
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to PCT/EP2007/061951 priority patent/WO2008055913A1/en
Publication of EP2080391A1 publication Critical patent/EP2080391A1/en
Application granted granted Critical
Publication of EP2080391B1 publication Critical patent/EP2080391B1/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements or protocols for real-time communications
    • H04L65/10Signalling, control or architecture
    • H04L65/1066Session control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12Messaging; Mailboxes; Announcements
    • H04W4/14Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements or protocols for real-time communications
    • H04L65/10Signalling, control or architecture
    • H04L65/1013Network architectures, gateways, control or user entities
    • H04L65/1016IMS
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16Gateway arrangements

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS Technical Field
  • The present invention relates to IP Multimedia Subsystem, IMS, technology. More particularly, and not by way of limitation, the present invention is directed to a system, devices and method for accessing IMS services via a Circuit Switched access network. Background
  • Mobile networks are currently evolving from pure circuit switched, CS, networks towards Internet Protocol IP based networks, and by seamlessly integrating into IP based infrastructure that is also used for the internet, the World Wide Web and the datacom industry. With this trend mobile networks closely follow the evolution steps of the wireline networks, where Voice over Internet Protocol, VoIP, via Digital Subscriber Line, DSL, access or via Wireless Local Area Network, WLAN, access is existing technology today.
  • Mobile operators that install IMS, IP Multimedia Subsystem, networks and offer IMS services want to make these services available to Global System for Mobile Communications/Wideband Code Division Multiple Access, GSM/WCDMA, subscribers. Currently, calls from and to this group of GSM/WCDMA subscribers are to be routed through the IMS network in order to reach the IMS service engine.
  • If there is no full radio coverage capable of bi-directional speech Packet Switched access, that is, the UE is not able to connect to a Packet Switched access network and thus to the IMS, then the circuit switched access must be used. The concept is called IMS Centralized Services, ICS. This service is used to carry bi-directional speech media and to access the IMS. The document " Centralised IMS Service Control (Release 8)", 3GPP TR 23.nnn V0.0.1 (2006-10 ) already relates to access of ICS services and S2H060017 "USSD Based Call Flows" for 3GPP TSG SA WG2 Architecture already describes the use of USSD in the CS domain for IMS registration and call control. However, users still cannot control IMS services and sessions in a suitable way over a circuit switched access.
  • Summary
  • It would be advantageous to have a system, devices and method for providing ICS and session control that overcomes unsuitable method of controlling the IMS services and sessions. The present invention provides such a system and method as outlined in appended claims 1, 10-12 and 14.
  • The present invention discloses a system and method for allowing IMS subscribers to perform session and service control of IMS services via a Circuit Switched, CS, access network. A User Equipment, UE, uses Unstructured Supplementary Service Data, USSD, via the CS network so as to associate the UE with ,an IMS adapter, IA. An IA identifier is provided to the UE and at least one USSD message is initiated via the CS access network to control a session or service in the IMS network.
  • The identifier is detected in the USSD message and is used to determine which IA instance is associated with the identifier. Then the USSD message is routed to the identified IA instance,
  • The IA instance then allocates a routing number to the IMS Centralized Service, CS, client in the UE. The routing number is returned to the ICS client is used for setting up a user plane from the UE to the IA.
  • In an embodiment of the invention, at a first registration of the subscriber/UE where the UE tries to first contact the IA, the IA informs an ICS client in the UE which USSD service code and IMS Adapter identifier to use for originating sessions and for control of ongoing sessions. This first registration can be done via USSD using CS access, or via SIP Registration using PS access. In order to access the network through CS access, the UE includes the IMS Adapter identifier in the message sent over USSD and uses the USSD service code that was provided at the initial registration of the subscriber. The IA identifier determines the particular IA node and the instance linking that IA node and the ICS client in the UE.
  • In another aspect, a USSD application coupled to the IA node, checks the USSD request for an IA identifier and USSD service code. The USSD application may be incorporated in HLR or in MSC nodes. It may also be outside the HLR or MSC nodes, but then the USSD application in the HLR or MSC must relay the USSD messages to this external node. If an IA identifier and USSD service code, used for identifying the correct USSD application in the HLR or MSC, is detected in the USSD request, the USSD application uses the IA identifier to find the correct IA node. If the MSC connecting the UE to the CS network does not have a USSD handler for the service code, then the USSD dialogue is directed through the HLR. The IA upon receipt of the USSD request replies with a Routing Number for use by the ICS client in the UE. The Routing number can be provided either as a response to the first registration or when the originating session invitation is received.
  • In still another aspect, the present invention is directed to a system for control of IP Multimedia Subsystem, IMS, sessions and services. The system involves a serving Mobile Switching Center coupled with a Home Location Register where either or both the MSC and the HLR are equipped with an Unstructured Supplementary Service Data handler.
  • The invention is furthermore directed to a User Equipment that is capable of accessing and associating with an IMS adapter via a Circuit Switched access network USSD. The UE includes an IMS client and an ICS client. The ICS client communicates with the IMS client to, among other things, receive IMS session requests from the IMS client. The UE initiates a session with an IMS Adapter in an accessible Circuit Switched network, using Unstructured Supplementary Service Data messaging. The USSD messages are sent to a USSD application in the circuit switched network, typically in a switching node, to establish a user plane between the UE and the IMS adapter. The IMS adapter is the connection between the UE and the IMS.
  • The UE receives USSD messages from the IA node via the switching node, e.g. an MSC or an MSC-S. The messages include a routing number allocated to the UE for routing an originating session request from the UE to an IA instance. The routing number is based on a USSD service code for identifying a particular IA instance in the IA node. The UE includes means for controlling a Media Proxy for handling the user plane, handling the media with regard to hold/retrieve service and session waiting and means for mapping the USSD requests to the appropriate SIP messages.
  • The above systems and devices can be adapted to any embodiments of the method.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • In the following section, the invention will be described with reference to exemplary embodiments illustrated in the figures, in which:
    • Figure 1 depicts a high level block diagram of an ICS system in accordance with a preferred embodiment of the present invention;
    • Figure 2 depicts a high level block diagram of an ICS system in accordance with a preferred embodiment of the present invention;
    • Figure 3 illustrates a USSD controlled originating Session Handling via CS Access according to an embodiment of the present invention;
    • Figure 4 depicts a USSD controlled originating Session Handling via CS Access, with an MSC based ICS USSD application in accordance with an embodiment of the present invention;
    • Figure 4a depicts a signal flow diagram of a USSD controlled originating Session setup according to a preferred embodiment of the present invention.
    • Figures 5a, 5b, 5c and 5d depict high level flow diagrams of a method of accessing and controlling IMS sessions via a circuit switched network, according to an embodiment of the present invention;
    • Figure 6 illustrates a high level block diagram of a USSD controlled Originating Session Setup in parallel to an already ongoing call, according to an embodiment of the present invention;
    • Figure 7 depicts signaling flow for MSC based USSD application illustrating how a USSD controlled Originating Session Setup in parallel to an already ongoing call, in accordance with an embodiment of the present invention;
    • Figure 8 illustrates architecture for terminating session handling in Gateway MSC, GMSC, forwarding of the call to IMS for service execution;
    • Figure 9 depicts a USSD controlled terminating Session Handling via CS Access after IMS service execution, in accordance with a preferred embodiment of the present invention;
    • Figure 10 illustrates an option for using the Send Routing Information, SRI" Mobile Application Part, operation towards the HLR to fetch the MSRN according to an embodiment of the present invention;
    • Figure 11 depicts Terminating Session Handling where the IA uses SRI to HLR for MSRN retrieval according to an embodiment of the present invention;
    • Figure 12 illustrates a signal flow diagram for using the Short Message Service, SMS-SRI and USSD for fetching of Roaming Number from the IA according to an embodiment of the present invention;
    • Figure 13 depicts the case of terminating call while there is an call already ongoing according to an embodiment of the present invention; and
    • Figure 14 depicts signal sequences using USSD in mid-call handling, UE initiated and network initiated, utilizing a USSD application in the MSC in accordance with an embodiment of the present invention.
    DETAILED DESCRIPTION OF THE INVENTION
  • As will be recognized by those skilled in the art, the innovative concepts described in the present application can be modified and varied over a wide range of applications. Accordingly, the scope of patented subject matter should not be limited to any of the specific exemplary teachings discussed above, but is instead defined by the following claims.
  • In the following description and claims, the terms "coupled" and "connected," along with their derivatives, may be used. It should be understood that these terms are not intended as synonyms for each other. Rather, in particular embodiments, "connected" may be used to indicate that two or more elements are in direct physical or electrical contact with each other. "Coupled" may mean that two or more elements are in direct physical or electrical contact. However, "coupled" may also mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other
  • The novel features that are considered characteristic of this invention are set forth with particularity in the appended claims. The invention itself, however, both as to its organization and method of operation, as well as additional objects and advantages thereof, will best be understood from the following description when read in connection with the accompanying drawing.
  • For 3rd Generation telecommunication networks, Unstructured Supplementary Service Data, USSD, is defined in 3GPP specifications 22.090, 23.090. The specifications define two modes of USSD: MMI-mode and application mode. The application mode of USSD allows a transparent transport of data between the network and the terminal so that it can be used by applications in the network and their peer applications in the terminal. USSD application mode can also be used for the present invention.
  • Figure 1 is a high level block diagram of a circuit switched network and a packet switched network connected to an IMS subsystem. As indicated, in the prior art a wireless user equipment that is unable to connect to a Packet Switched network does not have access to the IMS core and services. The circuit switched network does not have any access to the IMS Core and Services.
  • An IMS Network can include an IMS core and IMS related application servers. The IMS core comprises core nodes of the IMS network, for example P-CSCF, I-CSCF, S-CSCF, and HSS. The IMS core is typically involved in basic aspects of the session control such as session setup and release. Mid-session services may also involve IMS application servers in other parts of the IMS network.
  • Figure 2 depicts a high level block diagram of an ICS system in accordance with a preferred embodiment of the present invention. ICS system 200 emulates a 'standard' IMS terminal plus P-CSCF towards IMS core 218. Control protocol 202 is provided for session (e.g., a call) setup, mid-session procedures, IMS registration, etc., between IMS core 218 and C, the control functionality in the ICS client 204, i.e. for any desired Session Control. The combination of ICS client 204, signaling using control protocol 202 and IMS Adapter, IA, 208 are all considered Session Control handling functions, where IA 208, among other functions, performs IMS registration on behalf of UE 201 when IA 208 determines an IMS registration need, e.g., timeout or a request of the IMS client. Control Protocol 202 can be USSD based or may also be partly realized via SIP messages over PS access (not described further). So one preferred embodiment is to use SIP Register via PS access for the initial registration into IMS, while for session control and mid-session services USSD via CS access may be utilized. The following description refers to the case that USSD through CS access is used.
  • IA 208 seizes an internal instance for handling UE 201 during the lifetime of the IMS registration. IA 208 performs IMS registration on behalf of ICS client 204. In a USSD return message, IA 208 includes the IA identity and a USSD Service Code that is stored in ICS client 204. Subsequent requests from ICS client 204 include the IA identity and the USSD service code in order to find the correct IA node and instance.
  • A Media function, M, is also provided in ICS client 204 and is part of Media Connection handling 210, which handles the media connection from UE 201 to a media transport address. Media Proxy 212 provides the media transport address for UE 201 and performs toggling of outbound flows, muting, etc. for multiparty sessions; conference bridging is handled by IMS core 218. Signaling takes place between the Media functionality in ICS client 204 and a switching node, MSC-S, using DTAP signaling according to 3GPP 24.008. Signaling between the MSC-S and MGCF utilizes call control protocol 216, e.g., ISUP for voice media connection setup and SIP between the MGCF and Media functionality in IA 208.
  • The switching node, in particular a mobile switching center (MSC), can be a monolithic node handling both control signaling and the user plane like an MSC. Alternatively the switching node can be implemented as a server, e.g. an MSC server (MSC-S), which handles the control signaling while the user plane is handled in a Media Gateway according to control messages from the MSC server. In the present description generally either monolithic nodes or servers can be used in place of each other unless expressly indicated. The same applies for the GMSC, which may be implemented as a GMSC Server or as a monolithic node such as GMSC.
  • ICS client 204 in UE 201 includes the following functions: 1) receives an IMS Session request from the IMS client in the UE; 2) uses the ICS protocol over USSD (or a PS access if appropriate) for communication to the IA; 3) creates USSD messages according to the requests of the IMS client and preferably forwards information extracted from received USSD messages to the IMS client; and 4) establishes a media connection via the CS access.
  • The functions in the IA Node include: 1) allocates a routing number, e.g. an IMS routing number IMRN, to route originating sessions from the switching node, in this example the MSC-S to the IA; 2) controls a Media Proxy for user plane handling; 3) handling of media in case of hold or retrieve service, session waiting; and 4) map the USSD messages to appropriate SIP messages; and 5, stores the serving MSC-S address.
  • The USSD Application in MSC-S includes the following functions: 1) route the USSD based on the received IA identity and USSD Service Code and 2) allocates a routing number, e.g. a Mobile Station Roaming Number MSRN, to route terminating session to the MSC-S.
  • When the UE initiates an IMS session via a CS access, the UE uses, e.g., USSD to indicate this to the IA. The IA identity and USSD Service Code have been received from the allocated IA at Registration. Initial IMS registration of UE 201 takes place utilizing ICS system 200 and a designated IA instance is allocated and associated with ICS client 204 in UE 201. The same IA instance is associated with ICS client 204 as long as the IMS registration is active. If there is no USSD application available in MSC-S the specified handling in the MSC-S is to forward all USSD requests from the UE to the UE's HLR. This allows UE 201 to roam in the home network or any visited network.
  • Note that the IA identity identifies not only the IA node as such, but also sends an indication of the IA instance handling registration of the user within that IA node. The instance contains subscriber related data such as the public user identity, IMSI, MSISDN.
  • When requesting an originating session, ICS client 204 in UE 201 includes the stored IA identity and the USSD service code in a USSD originating session request. The ICS client uses the USSD Service Code received from the IA at IMS Registration.
  • Figure 3 illustrates a USSD controlled originating Session Handling via CS Access according to an embodiment of the present invention. In the embodiment the HLR hosts an ICS USSD Application. A USSD message is initiated in the ICS client in UE 212 and sent to MSC 304. As shown, MSC 304 does not recognize this USSD Service Code as there is no appropriate USSD application available. So, MSC 304 forwards this USSD message to the HLR 206. HLR 306 hosts a specific ICS USSD application;, this USSD application is specific to originating session requests and is identified in HLR 306 by the USSD Service Code. Signal path 303 illustrates the route taken by the USSD message.
  • HLR 306 USSD application analyzes the information included in the USSD message and extracts the IA identity, which is used to forward the USSD message to the appropriate IA node 310 and IA instance. IA node 310 then allocates a Routing Number, e.g. an IMRN, and returns that number to ICS client 304. The routing number is used by ICS client 304 for setting up a user plane connection 301 via a MGCF 308 to the IA 310.
  • Figures 4 and 4a depict USSD controlled originating Session Handling via CS Access, with an MSC based ICS USSD application in accordance with an embodiment of the present invention. Normally the serving MSC hosting this ICS USSD application is located in the home network 404. When the serving MSC hosting this ICS USSD application is located in a roaming network 410, co-operation between the home operator and the visited operator is required to enable the presence of such USSD application. Correspondingly, two scenarios for a session are illustrated: a home network scenario in which the UE 402 is located in the home network and a roaming network scenario in which the session is handled via a serving MSC in a visited network.
  • At IMS Registration, the IA 406 tells the ICS client in UE 402 which USSD Service Code to use for originating sessions. So IA 406 has full control over whether to allow using local USSD applications in the MSC or MSC-S where UE 402 is currently roaming.
  • The USSD message is received in MSC 408 (home network scenario) or MSC 410 (roaming network scenario) and the local USSD application on the MSC analyzes the USSD message and extracts the IA identity. The handling in the USSD application is the same as for the USSD application in the HLR described above. The IA 406 allocates a routing number and the user plane is routed with this routing number to the IA via either MSC 408 or MSC 410 and the respective MGCF prior to connecting with IMS core 414.
  • Figure 4a depicts a signal flow diagram of a USSD controlled originating Session setup according to a preferred embodiment of the present invention. The ICS client in the UE initiates registration of the UE by sending a USSD message to the MSC. The MSC then routes the USSD message to the IA addressed in this registration USSD message. The IA determines the ICS client, e.g. from the IMPI (IP Multimedia Private Identity) or the IA identification in the USSD message and takes the MSISDN from the stored public user id data, e.g. received during registration. A routing number is allocated to the ICS client and returned through the MSC to the ICS client in the UE. The IA stores a correlation between the allocated routing number and the registered ICS client. The registered ICS client is represented in the IMS network by a SIP URL.
  • The ICS client then initiates session setup utilizing the received routing number in a setup message through the MSC-S which sends a call control message, e.g. an ISUP message, containing the received routing number to the MGCF. The MGCF then converts the call control message to a SIP Invite message, also including the routing number and forwards the SIP Invite message to the IA. Using the stored correlation the IA translates the received routing number to the URL of the subscriber in the IMS network and sends the SIP Invite message to the IMS network. The IMS network responds in the normal manner. Upon receipt of the response from the IMS network, the ICS client establishes a user plane between the UE and the IMS network and the USSD dialog is closed.
  • Figure 5 depicts high level flow diagrams of methods of accessing and controlling IMS sessions via a circuit switched network, according to embodiments of the present invention. The process begins with a UE attempting to access IMS services in a network, 502. A determination is made whether there a packet switched access network is available and capable, 504, and if so, the connection is made directly to the IMS services via this packet switched access network, 506. However, if there is no PS access network available or not capable, an ICS client in the UE generates a USSD message to contact to an IMS adapter for connection to the IMS core, 508.
  • There are a number of reasons that the UE may not connect directly to the IMS core via a PS access network for IMS services. For instance a trigger for connecting to IMS through the CS access network may e.g. be: no PS network; the Radio Access Network is not capable; speech quality on the available PS network is poor, the subscriber directs the CS access action, PS network overloaded, etc.
  • The USSD message generated in step 508 is received by either an MSC and processed by a USSD application in the MSC or forwarded to the HLR, which typically has a USSD application, for processing, 510. A decision can be taken to handle the USSD message locally in the MSC or centrally in the HLR based on the USSD Service Code. This USSD Service Code is stored in the ICS client in the UE and was received from the IA at IMS Registration. The USSD request is checked for an IMS Adapter Identifier, 512, and the message is forwarded to the addressed IA, 514, and the associated IA instance. The IA instance allocates, 516, an IMRN as an example for a routing number and returns that routing number to the UE, 518, which then proceeds to connect to the IMS network through the CS network, 520. After the connection, the UE and the IMS network start an ongoing session, 521.
  • Referring now to Figure 5b, after the session establishment as described above, during the ongoing session, 521 there may be a mid-session service request, a terminating session request, or an originating session request (not illustrated here), in parallel to the ongoing session. If there are no requests, the process continues to check for the presence of requests. A mid-session service message may be generated by the UE or the IMS network. If a mid-session request is triggered in the UE, the UE sends a USSD message 524, with the IA identity included, and the IA maps the USSD message to a corresponding SIP message, 526. The SIP message is sent to the IMS network. When receiving a SIP response from the IMS network, the IA translates the response to an appropriate response USSD message, 527. If the mid-call request is generated by the IMS network, a SIP mid-session request is sent to the IA. The IA translates the SIP mid-session request to an appropriate USSD message and forwards that to the USSD application. This causes the USSD application in the MSC, or HLR, to send a USSD message to the ICS client in the UE. After receipt of the USSD response, the ongoing session is adapted according to the mid-session message, 528, e.g..the ongoing session is put on hold, or the subscriber is notified of being put on hold by the remote subscriber.
  • Referring now to Figure 5c, if a terminating session request is received during the ongoing session 521, a SIP Invite message is received in the IA, which translates the SIP message into an appropriate USSD message and forwards it to the USSD application, e..g. in the serving MSC, 530. The USSD application present in the serving MSC sends a network initiated USSD message to the ICS client in the UE, 534 causing the subscriber to be notified of the incoming session request, 536. The subscriber can then to decide whether accept the incoming session by putting the ongoing session on hold, or whether to reject the incoming session. Alternatively (not shown) the subscriber can also ignore the offered incoming session and after a timeout the incoming session will rejected in the IA.
  • Referring now to Figure 5d, if the network initiates a mid-session service request, a service request is received during the ongoing session, 521, a SIP message is received in the IA 540. This SIP message is translated by the IA into an appropriate USSD message 542, and the IA forwards it to the USSD application, e.g., in the serving MSC, 544. The USSD application present in the serving MSC sends a network initiated USSD message to the ICS client in the UE, 546 causing the subscriber to be notified of the incoming service request, 548. The session is then adapted according to the needs of the requested service, 550.
  • Figure 6 illustrates a high level block diagram of a USSD controlled Originating Session Setup in parallel with an ongoing session according to an embodiment of the present invention. When UE 602 attempts to setup a session with IMS C in parallel with ongoing session with IMS B, a USSD message is used to remote control the user plane handling in IA 604. The ICS Protocol over USSD 604 toggles user plane 610 in IA 606 via the ICS Protocol. The Session Setup using the ICS protocol to toggle the user plane assumes that the serving MSC-S has a local USSD application available. However, the USSD application may also located in the HLR without impact on the described mechanisms.
  • Figure 7 depicts signaling flow for MSC-S based USSD application illustrating a session setup in parallel with an ongoing session in accordance with an embodiment of the present invention. Before setting up the parallel session, the ongoing session is put on hold. A sequence for an HLR based USSD application is identical, except that all USSD messages are forwarded from MSC-S to HLR and the HLR hosts the USSD application for ICS. See Figure 3 for a simplified block diagram.
  • The bold double arrows, as in the other signal flow diagrams, indicate a user plane for transporting the payload while the other arrows indicate messages between the involved entities. Generally, both the protocol and the message are indicated. It should be noted that the parameters indicated in the messages are examples and that further parameters may be amended in the messages.
  • For correlation, IA 306 stores the routing number when sending the USSD message towards the client and checks the received SIP Invite message for this routing number. The routing number indicates the call destination such that the MSC-S routes the call to the MGCF which constitutes an interface between the CS call control, e.g. ISUP, and SIP signaling.
  • The IA remote controls a Media Proxy, MP, for controlling the user plane. This remote control protocol can e.g. be H.248 based. The MP, on behalf of the IA, mutes the user plane towards IMS B while the subscriber B is on hold. After the parallel session to IMS C it is then possible to toggle between both subscribers. The corresponding user plane control is done by the IA, who orders the related user plane operations from the MP.
  • Figure 8 illustrates architecture for terminating session handling in Gateway MSC, GMSC. Terminating sessions can be routed via a GMSC if an operator commonly uses MSISDN numbers for subscribers in IMS networks and CS networks. CAMEL mechanisms can be used to route a terminating session to an IMS network for service execution.
  • There are a number of options for routing the terminating session to the addressed subscriber. Note that as described above the GMSC and HLR have to route the terminating session to the IMS network first for service execution, but there is currently no good way to prevent HLR and GMSC from routing calls from IMS networks to IMS networks again causing, routing loops, i.e., a circular routing problem. So, for the purpose of avoiding circular routing a Domain Selection function can be linked in.
  • A call setup 801 from any originating subscriber, not shown, enters the GMSC 802, which sends, as normal, the message Send Routing Information, containing B number and requested basic service type, to HLR 804. The corresponding reply, Send Routing Information Result, containing T-CSI and the corresponding gsmSCF address set to the address of the IA, is returned to the GMSC 802. The T-CSI CAMEL service is invoked at the GMSC using A-number, B-number and the requested basic service type. This CAMEL invocation targets the gsmSCF, which however in this case, is the IA node (gsmSCF included in the IA, not shown). The terminating service domain is the IMS network and a routing number is allocated to the UE by the gsmSCF included in the IA. The IA stores the received information. A modified B-number - the routing number - is returned to the GMSC and the GMSC sends the call setup including the routing number to the IA 808 through a MGCF 810. When receiving the setup message, the IA 808 correlates the received routing number with the stored A-number, B-number and the basic service requested and forwards the session setup to the IMS network.
  • Figure 9 depicts a USSD controlled terminating Session Handling via CS Access according to a preferred embodiment of the present invention. This scenario shows how to route the above described terminating session, after terminating service execution in the IMS network. After terminating services are executed in the IMS network, the IMS core sends a SIP Invite message 902 to the IA 908. This is the normal behavior in IMS for terminating sessions, since the IA contains a P-CSCF and the P-CSCF address was stored in the IMS network as contact address of the terminating subscriber. Receiving the SIP Invite, the IA sends a Short Message Service - Send Routing Information, SMS-SRI, MAP operation to the HLR 904. The SMS-SRI is normally not used for terminating calls, but for terminating SMS. It is used here in order to obtain the address of the serving MSC-S from the HLR. So in the return message from HLR the serving MSC-S address is included.
  • The IA uses this serving MSC-S address for sending a termination session indication, utilizing USSD, to the USSD application in that serving MSC-S 906. MSC-S 906 sends the terminating session indication to UE 914 via a radio access node 912. The ICS client in UE 914 responds with a USSD message which is routed through the serving MSC-S 906 back to the IA 908. If the subscriber, or the UE, based on settings, has accepted the terminating session, the USSD application in MSC 906 allocates a routing number and adds it to the returned USSD message. The session setup, now including the received routing number is passed to MSC-S 906 through MGCF 910. The terminating session is then delivered to the ICS client in the UE. The radio link is kept up until the terminating session arrives at the UE. This avoids paging the UE again for the terminating session.
  • Figure 10 illustrates an option for using the normal CS Send Routing Information, SRI, Mobile Application Part, MAP, operation towards the HLR to fetch the routing number according to an embodiment of the present invention. After execution of terminating services in the IMS network, the IMS network sends a SIP Invite request to IA 1002. This is the normal behavior in IMS for terminating sessions, since the IA contains a P-CSCF and the P-CSCF address was stored in the IMS network as contact address of the terminating subscriber. Receiving the SIP Invite, the IA 1002 queries the HLR by using the SRI MAP operation. HLR 1004 then, as normal, retrieves a routing number from the serving MSC-S 1006 and returns the routing number to the requesting IA 1002 in the SRI operation result. The IA then uses the received routing number to deliver the terminating session through a MGCF 1008 to the serving MSC-S 1006. The serving MSC-S 1006 then delivers the session to the UE. Using this standard CS method for delivering the terminating session to the ICS client in the UE has the disadvantage, that it is not possible to deliver additional, IMS network originated data (e.g. SIP URL) to the ICS client. This additional data can be requested through USSD messages directly between IA 1002 and the ICS client in the UE. After receiving the routing number from HLR 1004, the Call Setup is forwarded to the UE client through a MGCF 1008 and the MSC-S 1006. The radio link is kept up until the terminating call arrives at the UE, this avoids paging the UE again for the terminating call
  • Figure 11 depicts an option for terminating session handling where the IA uses the normal CS Provide Roaming Number, PRN, Mobile Application Part, MAP, operation towards the serving MSC-S for routing number retrieval according to an embodiment of the present invention. The IMS core sends a SIP Invite request to IA 1102. This is the normal behavior in IMS for terminating sessions, since the IA contains a P-CSCF and the P-CSCF address was stored in the IMS network as contact address of the terminating subscriber. The terminating session handling is started in the IA with determining the serving MSC-S address. Here the IA can use the SMS-SRI MAP operation as described previously. Then the IA sends a terminating USSD message to the UE. If the subscriber, or the UE, based on settings, accepts the terminating session, the USSD application in the MSC-S allocates an routing number and adds it to the returned USSD message. The radio link is kept up until the terminating call arrives at the UE.
  • Figure 12 illustrates a signal flow diagram for using a MAP operation, Send Routing Information for Short Message Service, SRI-SMS, for fetching the serving MSC-S address from HLR. Send Routing Information, SRI, as such is used for calls between GMSC and HLR to retrieve a roaming number. SRI-SMS is the corresponding MAP message for SMS, there the SMS-GMSC asks the HLR for the address of the serving MSC. No roaming number is required for SMS, as SMS is plain signaling. The IA node asks the HLR for the serving MSC-S address by using SRI-SMS towards HLR. Then the HLR can contact the serving MSC-S directly for the terminating call.
  • The USSD message received via the MSC-S informs the ICS client in the user equipment, UE, that the connection initiated by the following IAM originates in IMS so that the client can handle the call accordingly. It may also include information which is not transmitted in the IAM like the identification, i.e. the URL, of the originating party.
  • Figure 13 depicts a message flow for the IA establishing a terminating session in parallel to an ongoing session. The signaling sequence shows two different cases, one where the subscriber rejects the offered, parallel session, and another option where the subscriber puts the active call on hold and accepts the offered, parallel session. No routing number allocation is needed for this case since the user plane between UE and IA is already established.
  • In the call flow one message is returned to the IA which indicates putting IMS-A on hold and to accept the incoming session from IMS-C. Alternatively two messages can be used, one in which the UE instructs the IA to put the call to IMS-A on hold and one in which the incoming session from IMS-C is accepted. Further alternatively both messages could be concatenated in one and the same USSD dialogue, resulting in the a very similar message sequence.
  • Figure 14 depicts signal sequences using USSD messages in mid-call handling, a network initiated case and a UE initiated case, utilizing a USSD application in the MSC-S in accordance with an embodiment of the present invention. Note that the USSD application can also be in the HLR, in this case the USSD messages are sent through HLR to the IA. This mechanism is transparent for the USSD application, so it does not have to know the details of the invoked service. The USSD application makes sure that the USSD messages can be exchanged via ICS client and IA. So this can work also for future, currently unknown IMS services.
  • Although the present invention has been described in detail, those skilled in the art should understand that they can make various changes, substitutions and alterations herein.
  • In general terms, a system for control of IP Multimedia Subsystem, IMS, sessions and services comprises;
    a switching node, coupled with a Home Location Register, HLR (306), at least one of the switching node and the HLR (306) being equipped with an Unstructured Supplementary Service Data, USSD, handler;
    a User Equipment (402), UE adapted to use USSD via a Circuit Switched, CS, network access to associate the UE (402) with an IMS adapter, IA (208);
    means for providing an IA identifier to the UE (402);
    means in the UE for initiating at least one USSD message via a Circuit Switched access network for control of a session or service in the IMS network;
    a detector for detecting the IA identifier in the at least one USSD message;
    means for determining an IA instance associated with the IA identifier;
    routing means for routing the USSD message to the IA instance;
    means associated with the IA instance for allocating a routing number to an IMS Centralized Service, ICS, client (204) in the UE;
    means coupled with the IA (208) for returning the routing number to the ICS client in the UE (402); and
    means associated with the ICS client (204) for using the routing number to set up a user plane from the UE to the IA (208).
  • The system may furthermore comprise means for associating the UE with an IMS adapter, IA, further comprises means for accessing the IMS network via a Packet Switched, PS, access network utilizing a PS protocol.
  • The system may also comprise means for including a USSD service code in the USSD message for associating the UE with a USSD application.
  • The system may furthermore comprise means for using subscriber related data contained in the IA instance for performing IMS registration, by the IA, on behalf of the user, the subscriber related data including a public user identity including International Mobile Subscriber Identity, IMSI, and Mobile Station ISDN, MSISDN.
  • The system may also comprise means for initiating at least one USSD message is triggered by one or more of: availability of a CS network; a subscriber action; poor speech quality on a Packet Switched, PS, network; cell broadcast indicates PS not capable of conversational PS access; Radio Access Network, RAN, not capable; PS network overloaded; and no PS coverage.
  • The system may furthermore comprise logic means associated with the ICS client in the UE initiating at least one mid-call service request by sending the at least one USSD message for a mid-call service request on a call related transaction or a call independent transaction to the switching node;
    the switching node including means for routing said USSD mid-call request to the IA;
    the IA having means for translating the USSD mid-call request into a corresponding SIP message and routing said SIP message to the IMS network;
    means in the IMS network for sending a SIP response to the IA;
    means for translating said SIP response into a corresponding USSD reply; and
    means for sending the USSD reply to the ICS client in the UE.
  • The system may in addition comprise means in the IMS network for initiating at least one mid-call service request by sending at least one SIP mid-call message to the IA;
    the IA having means for translating said SIP message into at least one USSD message for mid-call request, and sending the USSD message to the switching node;
    the USSD application in said switching node having logic means for causing the USSD message for mid-call request to be sent to the ICS client in the UE;
    the ICS client in the UE for sending a response to the IA; and
    the IA having means for translating said response to a corresponding SIP message and returning said SIP message to the IMS network.
  • The system may furthermore comprise the IMS network comprising means for sending an SIP Invite message to the IA, which requests a Mobile Station Routing number, MSRN, from the switching node; means in the IA for determining the switching node address by using a Short Message Service- Send Routing Information message, SMS-SRI, towards the Home Location Register, HLR; means for sending a terminating session indication via USSD message to the USSD application in the switching node; and means in the switching node for sending a terminating USSD message or transaction to the ICS client in the UE; and the USSD application in the switching node having logic means for allocating a Mobile Station Routing Number, MSRN, and adding the MSRN to the USSD result received from the ISC client in the UE and returned to the IA.
  • In the system, the switching node may comprise one of a Mobile Switching Center and a Mobile Switching Center server, MSC-S.
  • A general method in a UE for control of IMS sessions and accessing IMS services via a Circuit Switched network comprises the steps of:
    • receiving an IMS Session request from an IMS client by an IMS Centralized Service, ICS, client (204) in the UE (402);
    • receiving an IA identifier associated with an IA instance by the UE (402);
    • using an ICS protocol over USSD for communicating with an IMS Adapter, IA, (208) node via a USSD application in a switching node by initiating at least one USSD message comprising the IA identifier via a switching node in the Circuit Switched access network for control of a session or service in an IMS network;
    • the UE (402) receiving USSD messages from the IA node and forwarding information extracted from the USSD messages to the IMS client; and
    • using the extracted information for establishing a connection between the UE (402) and the IMS services via the Circuit Switched network.
  • In the method the step of the UE receiving the USSD messages may further comprise:
    • the UE receiving a routing number from the IA node for routing an originating session request from the UE via a switching node in the CS network to the IA node according to a received IA identifier;
    • controlling a Media Proxy for handling a user plane between the UE and the IMS network;
    • handling media with regard to hold/retrieve service and session waiting; and
    • mapping the USSD messages to appropriate SSP messages.
  • The method can further comprise triggering the initiation of at least one USSD message by one or more of:
    • availability of a CS network;
    • a subscriber action;
    • speech quality on a Packet Switched, PS, network is poor;
    • cell broadcast indicates PS not capable of conversational PS access;
    • Radio Access Network, RAN, not capable;
    • PS network overloaded and
    • no PS coverage.

Claims (15)

  1. A method of control of IP Multimedia Subsystem, IMS, sessions and services, the method comprising:
    a User Equipment (402), UE, using Unstructured Supplementary Service Data, USSD, via Circuit Switched, CS, network access so as to associate the UE (402) with an I MS adapter, IA (208, 406);
    providing an IA identifier to the UE (402);
    initiating at least one USSD message via a switching node in the Circuit Switched access network for control of a session or service in an IMS network;
    detecting the IA identifier in the USSD message;
    determining an IA instance associated with the IA identifier;
    routing the USSD message to the IA instance;
    said IA instance allocating a routing number to an IMS Centralized Service, ICS, client (204) in the UE;
    returning said routing number to said ICS client (204) in the UE (402); and
    said ICS client (204) using said routing number for setting up a user plane from the UE to the IA (208, 406).
  2. The method of claim 1, wherein associating the UE with an IMS adapter, IA, comprises access to the IMS network via a Packet Switched, PS, access network utilizing a PS protocol.
  3. The method of claim 1 or 2, the step of a UE using USSD to associate the UE with an IA further comprising including a USSD service code for associating the UE with a USSD application.
  4. The method of any preceding claim, further comprising the step of using subscriber related data contained in the IA instance for performing IMS registration, by the IA, on behalf of the user, the subscriber related data including a public user identity including International Mobile Subscriber Identity, IMSI, and Mobile Station ISDN, MSISDN.
  5. The method of any preceding claim, wherein the step of initiating at least one USSD message is triggered by one or more of:
    availability of a CS network;
    a subscriber action;
    poor speech quality on a Packet Switched, PS, network;
    cell broadcast indicates PS not capable of conversational PS access;
    Radio Access Network, RAN, not capable;
    PS network overloaded; and
    no PS coverage.
  6. The method of any preceding claim, further comprising the steps of:
    the ICS client in the UE initiating at least one mid-call service request by sending the at least one USSD message for a mid-call service request on a call related transaction or a call independent transaction to the switching node;
    the switching node routing said USSD mid-call request to the IA,
    the IA translating said USSD mid-call request into a corresponding SIP message and routing said SIP message to the IMS network;
    the IMS network sending a SIP response to the IA;
    the IA translating said SIP response into a corresponding USSD reply; and
    sending the USSD reply to the ICS client in the UE.
  7. The method of any preceding claim, further comprising the steps of:
    an IMS network initiating at least one mid-call service request by sending at least one SIP mid-call message to the IA;
    the IA translating said SIP message into at least one USSD message for mid-call request, and sending the USSD message to the switching node;
    the USSD application in said switching node sending the USSD message for mid-call request to the ICS client in the UE;
    the ICS client in the UE sending a response to the IA; and
    the IA translating said response to a corresponding SIP message and returning said SI P message to the I MS network.
  8. The method of any preceding claim, further comprising the steps of
    the IMS network sending an SIP Invite message to the IA, which requests a Mobile Station Routing number, MSRN, from the switching node;
    the IA determining the switching node address by using a Short Message Service-Send Routing Information message, SMS-SRI, towards the Home Location Register, HLR;
    the IA sending a terminating session indication via USSD message to the USSD application in the switching node; and
    the switching node sending a terminating USSD message or transaction to the ICS client in the UE; and
    the USSD application in the switching node allocating a Mobile Station Routing Number, MSRN, and adding the MSRN to the USSD result received from the ISC client in the UE and returned to the IA.
  9. The method of any preceding claim, wherein the switching node comprises one of a Mobile Switching Center and a Mobile Switching Center server, MSC-S.
  10. A system for control of IP Multimedia Subsystem, IMS, sessions and services, the system comprising:
    a switching node, coupled with a Home Location Register, HLR (306), at least one of the switching node and the HLR (306) being equipped with an Unstructured Supplementary Service Data, USSD, handler;
    a User Equipment (402), UE adapted to use USSD via a Circuit Switched, CS, network access to associate the UE (402) with an IMS adapter, IA (208);
    means for providing an IA identifier to the UE (402);
    means in the UE for initiating at least one USSD message via a Circuit Switched access network for control of a session or service in the IMS network;
    a detector for detecting the IA identifier in the at least one USSD message;
    means for determining an IA instance associated with the IA identifier;
    routing means for routing the USSD message to the IA instance;
    means associated with the IA instance for allocating a routing number to an IMS Centralized Service, ICS, client (204) in the UE;
    means coupled with the IA (208) for returning the routing number to the ICS client in the UE (402); and
    means associated with the ICS client (204) for using the routing number to set up a user plane from the UE to the IA (208).
  11. A method for use in a UE for control of IMS sessions and accessing IMS services via a Circuit Switched network, the method comprising:
    receiving an IMS Session request from an IMS client by an IMS Centralized Service, ICS, client (204) in the UE (402);
    receiving an IMS adapter, IA, identifier;
    using an ICS protocol over USSD for communicating with an IMS Adapter, IA, (208) node via a USSD application in a switching node by initiating at least one USSD message comprising the IA identifier via a switching node in the Circuit Switched access network for control of a session or service in an IMS network;
    the UE (402) receiving USSD messages from the IA node and forwarding information extracted from the USSD messages to the IMS client; and
    using the extracted information for establishing a connection between the UE (402) and the IMS services via the Circuit Switched network.
  12. A user equipment, UE, for IMS session control and accessing IMS services via a circuit switched network, the UE comprising:
    an IMS client;
    an IMS Centralized Service, ICS, client (204) in communication with the IMS client and comprising logic means for receiving an IMS Session request from the IMS client in the UE (402);
    means for receiving an IMS adapter, IA, identifier;
    logic means in the UE (402) for initiating a session with an IMS Adapter, IA (208), utilizing Unstructured Supplementary Service Data messaging by initiating at least one USSD message comprising the IA identifier via a switching node in the circuit switched access network for control of a session or service in an IMS network;
    means for receiving a USSD message from the IA (208), the message including a routing number for setting up a user plane from the UE (402) to the IA (208).
  13. The UE of claim 12, further comprising:
    means for:
    receiving USSD messages from the IA node via a switching node in the circuit switched network, wherein messages from the IA node include an allocated routing number for routing an originating session request from the UE to an IA instance based on a received IA identifier and a routing number for routing a terminating session request to the switching node;
    controlling a Media Proxy for handling the user plane;
    handling media with regard to hold/retrieve service and session waiting; and
    mapping the USSD requests to appropriate SIP messages.
  14. An IMS Centralized Service, ICS, client (204) for a User Equipment, UE (402), for controlling IMS sessions and accessing IMS services via a Circuit Switched, CS, network, the ICS client (204) comprising:
    means for receiving an IMS session request from an IMS client in the UE (402);
    means for receiving an IMS adapter, IA, identifier;
    means for initiating at least one USSD message for transmission to the CS network, the USSD message comprising a USSD service code and the IMS Adapter, IA, identifier; and
    means for receiving a USSD message from the IA (208), the message including a routing number for setting up a user plane from the UE (402) to the IA (208).
  15. The ICS client of claim 14, further comprising
    means for using an ICS protocol over USSD for communicating with an IA via the circuit switched network;
    means for creating USSD messages according to the requests of the IMS client in the UE;
    means for communicating information extracted from USSD messages received from an IMS network at the IMS client in the UE; and
    means for handling a media connection via the CS access network.
EP07822267.6A 2006-11-06 2007-11-06 Methods and apparatuses for session control of ims services via a cs access by ussd messages Active EP2080391B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US86449306P true 2006-11-06 2006-11-06
PCT/EP2007/061951 WO2008055913A1 (en) 2006-11-06 2007-11-06 Method and apparatuses for allowing session control of ims services via a cs access by ussd messages

Publications (2)

Publication Number Publication Date
EP2080391A1 EP2080391A1 (en) 2009-07-22
EP2080391B1 true EP2080391B1 (en) 2017-06-14

Family

ID=39154979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07822267.6A Active EP2080391B1 (en) 2006-11-06 2007-11-06 Methods and apparatuses for session control of ims services via a cs access by ussd messages

Country Status (6)

Country Link
US (1) US8743868B2 (en)
EP (1) EP2080391B1 (en)
CN (1) CN101573996B (en)
RU (1) RU2446624C2 (en)
WO (1) WO2008055913A1 (en)
ZA (1) ZA200903090B (en)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006001503B4 (en) * 2006-01-11 2016-09-15 Intel Deutschland Gmbh Method and system for transmitting additional data
US8391873B2 (en) * 2006-07-21 2013-03-05 Qualcomm Incorporated Systems and methods for coordinating supplementary services for voice telephone calls in a centralized fashion
US8019055B2 (en) * 2007-01-19 2011-09-13 Nokia Corporation Media instant messaging for mobile device
CN101242634B (en) * 2007-02-07 2012-05-23 华为技术有限公司 Service providing system, device and method
WO2009053847A2 (en) * 2007-04-14 2009-04-30 Marvell Israel Ltd. System and process for internet protocol multimedia subsystem centralized service with enhanced unstructured supplementary service
EP2241080B1 (en) * 2008-01-10 2015-06-17 Optis Wireless Technology, LLC Ip multimedia subsystem registration
CN101960778A (en) * 2008-02-26 2011-01-26 朗讯科技公司 Online charging for supplementary services in IMS networks
TR200802671A1 (en) * 2008-04-17 2009-11-23 Vodafone Teknoloji Hizmetleri A.Ş. GSM Subscribers and IMS-Based Communication Method Between Session.
US8107932B1 (en) * 2008-09-10 2012-01-31 Rockstar Bidco Lp Enabling mid-call services to be added to a communication session by a wireless device
US8787362B2 (en) * 2009-04-01 2014-07-22 Qualcomm Incorporated Fall back using mobile device assisted terminating access domain selection
US9479600B2 (en) * 2009-07-09 2016-10-25 Telefonaktiebolaget L M Ericsson (Publ) Methods and apparatuses for initiating provisioning of subscriber data in a HSS of an IP multimedia subsystem network
CN101997697B (en) 2009-08-12 2012-06-20 华为终端有限公司 Service control method and device for interface I1
CN101997846A (en) * 2009-08-14 2011-03-30 华为终端有限公司 Session handling method and device as well as communication system
CN101702793B (en) * 2009-11-10 2013-08-21 中兴通讯股份有限公司 Implementation method, system and equipment of USSD service in CDMA network
DE102009052815A1 (en) * 2009-11-13 2011-05-19 Vodafone Holding Gmbh Starting a network service in a communication network
CN101730018B (en) * 2009-11-19 2012-11-28 中兴通讯股份有限公司 Point-to-point chat method and system
CN101827322B (en) 2010-03-02 2013-02-13 华为终端有限公司 Business control method and device
CN102202432B (en) * 2010-03-24 2014-10-08 华为技术有限公司 A network adapter apparatus and method
US9055546B2 (en) 2010-05-03 2015-06-09 Telefonaktiebolaget L M Ericsson (Publ) Handling a registration timer to provide service continuity in IMS
US9444854B2 (en) * 2010-09-07 2016-09-13 T-Mobile Usa, Inc. Session initiation protocol (SIP) router
US8913594B2 (en) * 2011-03-24 2014-12-16 Telefonaktiebolaget L M Ericsson (Publ) Routing of a CDMA MS initiated USSD request
BR112014029399A2 (en) * 2012-05-25 2017-06-27 Mavenir Systems Inc interconnection to circuit switched kicker; application procedure / notification network initiating USSD; location request procedure received by mobile phone; providing subscriber information procedure
US10004003B2 (en) 2011-05-26 2018-06-19 Mavenir Systems, Inc. Internetworking for circuit switched fallback-network initiated USSD request/notification procedure mobile-terminated location request procedure provide subscriber information procedure
EP2716001B1 (en) * 2011-06-01 2016-08-10 Telefonaktiebolaget LM Ericsson (publ) Routing of calls in ip multimedia subsystem centralized services networks
CN103703474B (en) * 2011-07-14 2018-01-19 瑞典爱立信有限公司 Data processing means for generating
US9992605B2 (en) * 2011-07-20 2018-06-05 Mediatek Inc. Methods for providing serving network information and communications apparatuses utilizing the same
US9392439B2 (en) 2011-07-20 2016-07-12 Mediatek Inc. Methods for providing serving network information and communications apparatuses utilizing the same
US8712409B2 (en) 2012-03-05 2014-04-29 T-Mobile Usa, Inc. System and method for terminating communication sessions with roaming mobile devices
WO2013144778A1 (en) * 2012-03-30 2013-10-03 Balefyre (Pty) Ltd. A method and system for ussd emulation
CN102984678B (en) 2012-12-07 2015-07-29 华为技术有限公司 The method of Unstructured Supplementary Service Data processing and service means ussd
EP3047651A4 (en) * 2013-09-18 2017-04-12 Samsung Electronics Co., Ltd. A method and system for integrating content viewing and communication in immersive social centre session
US9712668B2 (en) * 2014-05-01 2017-07-18 Gogo Llc Systems and methods for notifying electronic devices of voice-based communication requests
US20170094564A1 (en) * 2015-09-30 2017-03-30 Apple Inc. Device, System and Method for Synchronizing Multiple Devices

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2190309C2 (en) * 1996-02-20 2002-09-27 Эрикссон Инк. Graphic presentation transmission to mobile terminals
PT1271896E (en) * 2001-06-18 2004-12-31 Swisscom Mobile Ag Method and system for internet protocol (ip) mechanisms in heterogenetic networks
US7711002B2 (en) * 2001-06-26 2010-05-04 Link Us All, Llc Transcoding SMS-based streamed messages to SIP-based IP signals in wireless and wireline networks
RU2314658C2 (en) * 2002-10-09 2008-01-10 Нокиа Корпорейшн Communication system
WO2004054293A1 (en) * 2002-12-09 2004-06-24 Me-Omnicom B.V. Transfer of ussd messages to/from ussd external node
CN100346615C (en) 2003-06-17 2007-10-31 华为技术有限公司 Method for receiving external network data by target user equipment
US20050107100A1 (en) * 2003-11-14 2005-05-19 Patrik Gustafsson Method of modifying parameters of user terminal, radio system and user terminal
CA2609942A1 (en) * 2005-05-27 2006-11-30 Nortel Networks Limited Circuit-switched and multimedia subsystem voice continuity with bearer path interruption
US8208442B2 (en) * 2005-08-22 2012-06-26 Genband Us Llc Multimedia subsystem service control for circuit-switched subsystem calls
US7760712B2 (en) * 2006-08-11 2010-07-20 Research In Motion Limited System and method for managing call continuity in IMS network environment

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2080391A1 (en) 2009-07-22
US20080117893A1 (en) 2008-05-22
US8743868B2 (en) 2014-06-03
CN101573996A (en) 2009-11-04
CN101573996B (en) 2012-11-14
RU2009121525A (en) 2010-12-20
ZA200903090B (en) 2010-07-28
RU2446624C2 (en) 2012-03-27
WO2008055913A1 (en) 2008-05-15

Similar Documents

Publication Publication Date Title
US9451422B2 (en) Method, system and network device for routing a message to a temporarily unavailable network user
EP1758323B1 (en) A method for terminal identifying capability interaction route control while ims and cs are coinstantaneous
EP1842392B1 (en) Service convergence across multiple communication domains
US7400881B2 (en) Method for the routing of communications to a voice over internet protocol terminal in a mobile communication system
EP2011347B1 (en) Methods, systems, and computer program products for providing internet protocol multimedia subsystem(ims) registration services for non-ims devices
EP2047655B1 (en) A roaming gateway
US7870262B2 (en) Method and element for service control
US8260250B2 (en) Method and apparatus for handling emergency calls in a packet switched radio access network
CN101385287B (en) Methods, systems, and computer program products for using an e.164 number (enum) database for message service message routing resolution among 2g and subsequent generation network systems
US6871070B2 (en) Communication system for providing roaming between an internet protocol multimedia system and a circuit-switched domain
US20070058791A1 (en) Method for handoff from packet switching domain to circuit switching domain and equipment thereof
US6954654B2 (en) Provision of services in a communication system including an interworking mobile switching center
US20020110104A1 (en) Hybrid media gateway control function providing circuit-switched access to a packet-switched radio telecommunications network
EP2081348A1 (en) Message interworking method, system, entity and message delivery report processing method, system, the entity, terminal for message interworking
US6996087B2 (en) Communication system including an interworking mobile switching center for call termination
US7640036B2 (en) Method for performing inter-system handovers in a mobile communication system
US20070070976A1 (en) Mobile and packet-based call control
US20060105766A1 (en) Method for delivering a call to a dual-mode mobile unit using a single number
CN101433036B (en) Method and system of forwarding capability information of user equipment in internet protocol multimedia subsystem network
US7801116B2 (en) System, device, and method for providing call forwarding in dual subscription mode
EP1863236B1 (en) Method and apparatus for combining voice and multimedia services between CSI terminal and IMS terminal
US20060294245A1 (en) Method and system for a communications session join function to facilitate the provision of enhanced communications services
US7535889B2 (en) Server component redirection of new media path portion between packet-switched and circuit-switched portions of mobile switching center
CN101142833B (en) Device for controlling a cs domain subscriber terminal access to an IMS communication network services
US8717876B2 (en) Providing packet-based multimedia services via a circuit bearer

Legal Events

Date Code Title Description
AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

17P Request for examination filed

Effective date: 20090506

DAX Request for extension of the european patent (to any country) (deleted)
17Q First examination report despatched

Effective date: 20140416

REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Ref document number: 602007051335

Country of ref document: DE

Free format text: PREVIOUS MAIN CLASS: H04Q0007220000

Ipc: H04L0029060000

RIC1 Information provided on ipc code assigned before grant

Ipc: H04L 29/06 20060101AFI20170320BHEP

Ipc: H04W 4/14 20090101ALI20170320BHEP

INTG Intention to grant announced

Effective date: 20170331

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 901932

Country of ref document: AT

Kind code of ref document: T

Effective date: 20170615

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602007051335

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20170614

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170915

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 901932

Country of ref document: AT

Kind code of ref document: T

Effective date: 20170614

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170914

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171014

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602007051335

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

26N No opposition filed

Effective date: 20180315

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171130

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171130

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20171130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170614

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171106

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171106

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171106

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171130

PGFP Annual fee paid to national office [announced from national office to epo]

Ref country code: DE

Payment date: 20181128

Year of fee payment: 12

PGFP Annual fee paid to national office [announced from national office to epo]

Ref country code: FR

Payment date: 20181127

Year of fee payment: 12

Ref country code: GB

Payment date: 20181127

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20071106